1 files changed, 11 insertions, 1 deletions
diff --git a/tests/src/CoreMangLib/cti/system/runtime/interopservices/marshal/marshalsizeof1.cs b/tests/src/CoreMangLib/cti/system/runtime/interopservices/marshal/marshalsizeof1.cs
index 030e767bac..c0d16b8623 100644
--- a/tests/src/CoreMangLib/cti/system/runtime/interopservices/marshal/marshalsizeof1.cs
+++ b/tests/src/CoreMangLib/cti/system/runtime/interopservices/marshal/marshalsizeof1.cs
@@ -225,7 +225,17 @@ public class MarshalSizeOf1
             TestMultiMemberStruct1 obj = new TestMultiMemberStruct1();
             obj.TestInt = TestLibrary.Generator.GetInt32(-55);
             obj.TestDouble = TestLibrary.Generator.GetDouble(-55);
-            int expectedSize = 16; // sizeof(double) + sizeof(int) + padding
+            int expectedSize;
+
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows) || (RuntimeInformation.ProcessArchitecture != Architecture.X86))
+            {
+                expectedSize = 16; // sizeof(double) + sizeof(int) + padding
+            }
+            else
+            {
+                // The System V ABI for i386 defines double as having 4-byte alignment
+                expectedSize = 12; // sizeof(double) + sizeof(int)
+            }
 
             int actualSize = Marshal.SizeOf(obj);